/***************************************************************************
* copyright            : (C) 2001-2004 Advanced Internet Designs Inc.
* email                : forum@prohost.org
* $Id: lib.js,v 1.26 2005/06/14 15:07:33 hackie Exp $
*
* This program is free software; you can redistribute it and/or modify it 
* under the terms of the GNU General Public License as published by the 
* Free Software Foundation; either version 2 of the License, or 
* (at your option) any later version.
***************************************************************************/

JS_HELPOFF = false;
/* indentify the browser */
DOM = (document.getElementById) ? 1 : 0;
NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
OPERA = navigator.userAgent.indexOf("Opera") > -1 ? 1 : 0;
MAC = navigator.userAgent.indexOf("Mac") > -1 ? 1 : 0;

/* edit box stuff */
function insertTag(obj, stag, etag)
{
	if (navigator.userAgent.indexOf("MSIE") > -1 && !OPERA) {
		insertTagIE(obj, stag, etag);
	} else if (window.getSelection && navigator.userAgent.indexOf("Safari") == -1) {
		insertTagMoz(obj, stag, etag);
	} else {
		insertTagNS(obj, stag, etag);
	}
}

function insertTagNS(obj, stag, etag)
{
	obj.value = obj.value+stag+etag;
}

function insertTagMoz(obj, stag, etag)
{
	txt = window.getSelection();

	if (!txt || txt == '') {
		t = document.getElementById('txtb');
		h = document.getElementsByTagName('textarea')[0];
		if (t.selectionStart == t.selectionEnd) {
			t.value = t.value.substring(0, t.selectionStart) + stag + etag +  t.value.substring(t.selectionEnd, t.value.length);
			return;
		}
		txt = t.value.substring(t.selectionStart, t.selectionEnd);
		if (txt) {
			t.value = t.value.substring(0, t.selectionStart) + stag + txt + etag +  t.value.substring(t.selectionEnd, t.value.length);
			return;
		}
	}
	obj.value = obj.value+stag+etag;
}

function insertTagIE(obj, stag, etag)
{
	r=document.selection.createRange();
	if( document.selection.type == 'Text' && (obj.value.indexOf(r.text) != -1) ) {
		a = r.text;
		r.text = stag+r.text+etag;
		if ( obj.value.indexOf(document.selection.createRange().text) == -1 ) {
			document.selection.createRange().text = a;
		}
	}
	else insertAtCaret(obj, stag+etag);	
}

function dialogTag(obj, qst, def, stag, etag)
{
var q;
	q = prompt(qst, def);
	if ( !q ) return;
	stag = stag.replace(/%s/i, q);
	insertTag(obj, stag, etag);
}

function url_insert()
{
	if ( check_selection() )
		dialogTag(document.post_form.msg_body, 'Location:', 'http://', '[url=%s]', '[/url]');
	else
		dialogTag(document.post_form.msg_body, 'Location:', 'http://', '[url]%s[/url]', '');
}

function check_selection()
{
var rn;
var sel;

	if ( document.layers ) return 0;
	if ( navigator.userAgent.indexOf("MSIE") < 0 ) return 0;

	r = document.selection.createRange();

	if ( r.text.length && (document.post_form.msg_body.value.indexOf(r.text) != -1) ) {
		a = document.selection.createRange().text;
		rn = Math.random();
		r.text = r.text + ' ' + rn;
		
		if ( document.post_form.msg_body.value.indexOf(rn) != -1 ) {
			sel = 1;
		} else {
			sel = 0;
		}
		
		document.selection.createRange().text = a;
	}
	
	return sel;
}

function storeCaret(textEl)
{
	 if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}

function insertAtCaret(textEl, text)
{
	if (textEl.createTextRange && textEl.caretPos)
	{
		var caretPos = textEl.caretPos;
		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? text + ' ' : text;
	}
	else 
		textEl.value  =  textEl.value + text;
}

function email_insert()
{
	if ( check_selection() ) {
		dialogTag(document.post_form.msg_body, 'Email:', '', '[url=mailto:%s]', '[/url]');
	}	
	else
		dialogTag(document.post_form.msg_body, 'Email:', '', '[email]%s[/email]', '');
}

function image_insert()
{
	dialogTag(document.post_form.msg_body, 'Image URL:', 'http://', '[img]%s[/img]', '');
}

function youtube_insert()
{
	dialogTag(document.post_form.msg_body, 'Youtube Video ID:', '', '[youtube]%s[/youtube]', '');
}
function insertParentTagIE(stag, etag)
{
	r=window.opener.document.selection.createRange();
	obj = window.opener.document.post_form.msg_body;
	
	if( window.opener.document.selection.type == 'Text' && (obj.value.indexOf(r.text) != -1) ) {
		a = r.text;
		r.text = stag+r.text+etag;
		if ( obj.value.indexOf(window.opener.document.selection.createRange().text) == -1 ) {
			window.opener.document.selection.createRange().text = a;
		}
	}
	else insertAtCaret(obj, stag+etag);
}

function insertParentTagNS(stag, etag)
{
	window.opener.document.post_form.msg_body.value = window.opener.document.post_form.msg_body.value + stag + etag;
}

function insertParentTag(stag, etag)
{
	if ( document.all ) 
		insertParentTagIE(stag, etag);
	else
		insertParentTagNS(stag, etag);
	
}

function window_open(url,winName,width,height)
{
	xpos = (screen.width-width)/2;
	ypos = (screen.height-height)/2;
	options = "scrollbars=1,width="+width+",height="+height+",left="+xpos+",top="+ypos+"position:absolute";
	window.open(url,winName,options);
}

function layerVis(layer, on)
{
	thisDiv = document.getElementById(layer);
	if (thisDiv) {
		if (thisDiv.style.display == "none") {
			thisDiv.style.display = "block";
		} else {
			thisDiv.style.display = "none";
		}
	}
}

function fud_msg_focus(mid_hash)
{
	if (!window.location.hash) {
		self.location.replace(window.location+"#"+mid_hash);
	}
}

function chng_focus(phash)
{
	window.location.hash = phash;
}

function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag) 
{
	// find all occurences of the search term in the given text,
	// and add some "highlight" tags to them (we're not using a
	// regular expression search, because we want to filter out
	// matches that occur within HTML tags and script blocks, so
	// we have to do a little extra validation)
	var newText = "";
	var i = 0, j = 0;
	var lcSearchTerm = searchTerm.toLowerCase();
	var lcBodyText = bodyText.toLowerCase();

	while ((i = lcBodyText.indexOf(lcSearchTerm, i)) > 0) {
		if (lcBodyText.lastIndexOf(">", i) >= lcBodyText.lastIndexOf("<", i)) {
			if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
				newText += bodyText.substring(j, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
				i += searchTerm.length;
				j = i;
				continue;
			}
		}
		i++;
	}
	newText += bodyText.substring(j, bodyText.length);

	return newText;
}

function highlightSearchTerms(searchText)
{
	if (!document.body || typeof(document.body.innerHTML) == "undefined") {
		return false;
	}
  
	var bodyText = document.body.innerHTML;
	searchArray = searchText.split(" ");

	var j = 0;
	for (var i = 0; i < searchArray.length; i++) {
		if (j > 9) j = 0;
		bodyText = doHighlight(bodyText, searchArray[i], '<span class="st'+j+'">', '</span>');
		j++;
	}

	document.body.innerHTML = bodyText;
	return true;
}

function rs_txt_box(name, col_inc, row_inc)
{
        if (IE4) {  
                var obj = document.all[name];
        } else {
                var obj = document.getElementById(name);
        }                                   

        obj.rows += row_inc;           
        obj.cols += col_inc;            
}